• sukadev@linux.vnet.ibm.com's avatar
    powerpc: Implement CONFIG_STRICT_DEVMEM · 1d54cf2b
    sukadev@linux.vnet.ibm.com authored
    As described in the help text in the patch, this token restricts general
    access to /dev/mem as a way of increasing the security. Specifically, access
    to exclusive IOMEM and kernel RAM is denied unless CONFIG_STRICT_DEVMEM is
    set to 'n'.
    
    Implement the 'devmem_is_allowed()' interface for Powerpc. It will be
    called from range_is_allowed() when userpsace attempts to access /dev/mem.
    
    This patch is based on an earlier patch from Steve Best and with input from
    Paul Mackerras and Scott Wood.
    
    [BenH] Fixed a typo or two and removed the generic change which should
           be submitted as a separate patch
    Signed-off-by: default avatarSukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
    Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
    1d54cf2b
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